Thanks for the reply. Just wondering, how do you come to that conclusion of how both geometries are similar? I've been giving that part a lot of thought and I can't determine a good reason on why the two geometries would have a similar performance.
Interesting suggestion you have on the...
Some Background
I am working on a soccer robotics project called RoboCup (perhaps people here have heard of it), which revolves around building a fleet of autonomous soccer robots that play against each other (league website - http://small-size.informatik.uni-bremen.de/ ). The kicking...
What about if the wheel was rolling WITH slipping? How would the friction force in the slip be modeled in the FBD? I'm not even sure if that is even a reasonable assumption. Pretty much everything that I've learned about rotating bodies in terms of friction has had to do with rolling with slip.
This is more of a curiosity question rather than a homework question, and it has to do with how to relate the electrical motor torque to a vehicle's motion using Newton's Laws.
Now for a vehicle (say RC car) moving forward in a straight line, the forces that are acting on it are the...
Homework Statement
The moment of inertia of a uniform sphere of mass m and radius r about an axis passing through its center of mass is (2/5) mr^2. If half of the sphere is removed, what is the moment of inertia about the same axis?
Homework Equations
integral of r^2 dm
The Attempt at a...
No problem. Glad to have helped!
I was actually considering doing the question for you and then I realized that I should guide you to the answer instead.
Good thing I didn't do it for you!
Maybe this statement "Assuming the force the man pulls with is limited only by friction with the ground" is something significant here? I am not sure.
I overheard some other students asking for help on this exact same question. The teacher did mention the method you told me about involving...
Oh yeah, good point. I don't know what I was thinking back there. I redid the calculations now with tension included but now I am getting 2.03m/s^2 down the slope
http://img139.imageshack.us/img139/2606/mech220dynamics23gg8.jpg
Using the coefficient of kinetic friction for the man, I get 1.986m/s^2 down the slope and using the coefficient of static friction for the man, I get 1.20m/s^2 down the slope.
I do get the right answer for this question with your method, but this method appears to only work for this question but it fails for the question after that. Your method does make logical sense to me so I am puzzled as to how it isn't working for the other question as well. The other question...
Well I just tried it and I got 3.85m/s^2. The correct answer is supposed to be 2.78m/s^2.
http://img209.imageshack.us/img209/5355/mech220dynamics22es3.jpg
I have an answer for this question, but I am not quite sure if it's right so I would just like to run it by you guys and see what you think. The reason I am not sure is because I am not sure about how I reasoned that T should be 0. I used the reasoning that a rope can't exactly be "pushed"...